OBD-II code · Powertrain (generic, extended)
P28D8 Clutch B Motor Overspeed
The clutch B actuator motor exceeds the calibrated maximum speed. Load on the motor unexpectedly low or rotor position offset.
Is it safe to drive with P28D8?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyMechanical load lost (broken coupling)
- PossibleRotor position sensor offset
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 3–10 h
- Emissions test
- Usually unaffected
- Parts involved
- Clutch Motor B, Clutch Actuator B
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.